Automatically threading shuttle for looms



May 19, 1925.

E. s. STIMPSON AUTOMATICALLY THREADING SHUTTLE FOR LOOMS.

Fild April 19. 1923 2 Sheet-Sheet '1 T i I l9- MZW i ii an May-19,1925 v 1,538,224

5. s. STIMPSON AUTOMATICALLY THREADING FQR VLOQMS Filed April 19 1923 z sneets-sheez 2 VEN TOR MZ xfm m ATTOF? NEY Patented May 19, 192s. y

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,To all whom Be it known-that I; EDWARD S. Samson, a citizen of the United States, residing {at Hopedale, in the "county ofWoreester and State'of Massachusetts, have invented an Improvement in Automatically Threading Shuttles forLooms, of which thefollowing description, in connection with the accompanying drawings,- is a specification, like characters on the drawings representinglike parts; 1 f; {This invention relates to automatically threadin weft or hlling in the shuttle is replenished from time to time while theloom continues Automatically threading} loom shuttles have heretofore been provided with a thread- .i ng block made'of brass or "similar soft and 9 yielding material which required to be ma;

chined to provide thenecessary structure, and then finished to facilitate movement of the thread over the contactingsur-faces during'threading andsubseqlientweaving. Therelatively soft and yielding characterof such threading blocks and the constant attrition to which they are subjected during weaving soon-renders suchthreadiiig blocks iinsrviceable' and frequent renewals are necessi- 3 tatedL- Furthermore, when the shuttle enters' the shuttle box, it is subjected to considerable pressure;fandf-especiall is this the case .Whenthe loom bangs-o with theresult that the threading blocks heretoforeused become bent and the unsupportedshuttle wood at such timesbecomes broken. This same objectionable condition occurs;

also, where thethreadingblocks are formed of sheet material cut and bent toshape,

' because the flexibility of-the material fails to fie support to theshuttle wood.

important'feature of the. present invention, therefore, consistsof a threading block, for, automatically threading loom shuttles formed of cast iron, capable of re-- sisting the wear of the threadthereon dur-'- ingweaving, and having a surface cover in of rust-proof material which ofiersvno;

' ob ectionable resistanceto the movement of the thread thereover, either during the shuttle threading operation or subsequent weaving. When a shuttle having the thr block of the" resent invention is subjec to the shuttlegox pressure at the. end of its shuttles for looms wherein-' the i flight or when the loom bangs-off, the unyielding character of thethreading block is such that the'wo'od of the shuttle is supported betweenthe points of pressure and does 'jnot become broken or splintered.

' In the pr or patent fapplicant,

1,483,492, dated Februa 12, 1924, there was shown, described an broadly claimed j automatically threa grs uttle havingla thread passage extendin longitudina y thereof and provided wit a top opening for theready 'entrance. and exit of the a thread, and a thread casting and guiding device which functioned to cast or throw the thread from the control of the said device on the'forma'tion of a loop or'overthrowand partially unthread the shuttle when the ter was suddenly arrested in the replenishing box; Theshuttle of the prior patenthas been found eflicient and effective in practical operation; Q j I; In certain aspects of structure, the present invention is a;further development of the "shuttle of theearlier patent'and relates to features which seek to improve the construc- .tionand render it more efiicient during threading and unthreading, and while the loom continues to operate in the production ofcloth. t b j when the shuttle is partiallyvunthreaded, that is, when it is not delivered from' the shuttle through the side delivery eye and the'shuttle is picked. from the replenishingbox, there is liable to be less tension at times on the thread laid in the she'dthan "when' the shuttle is fully'threaded, and one feature of the present invention, .therefore, consists in a thread guiding recess leading towards the end ofthe shuttle and having a friction pad and breastwall of eater height-than the bridge of the threadmg'block 'and over which the threadi's deflected as the shuttle across theloom fromthe replemshmg box, "the defleetionof the 'threadover the breast wall and the friction ad servin at such times to givethe desi amount 0 tension to the thread.

In the prior patent 'ding scroll 1s shownas secured in pos1- tion in the thread'pass'age bythe bolt ordinarily used in securing a threading block' in position. This construction has been found practicaland efiicient inoperation, but the present invention seeks to further sethe thread casting and V tion and drawings of one goo form of the invention.

In the-drawings: Fig. '1 is a perspective view of one end of a shuttle containing the present invention, the shuttle being shown as coming to rest in the replenishing box with the formation of a loop or overthrow in the thread;

Fig. 2 is'a side elevation. of the shuttle i shown by Fig. 1;

Fig. 3 is across section on line 33 of Fig. 2; I

, Fi i is a perspective view of the threadingvb ock detached from the shuttle;

ig. 5 is a perspective view of the threading block in another position; 1 j

Fig. 6 is a view of the threading block looking at the bottom thereof;

Fig. 7 is an enlar ed longitudinal section of the threading en of the shuttle showing the wood of the shuttle cut away to form a recess for the threading block and the thread guiding recess with the friction pad therein;

Fi- 8 is a view similar to that of Fi 7 but sliowing the threading block secure in the block chamber and the thread or weft deflected over the breast wall of the guidin recess; v

Fig. 9 is a perspective view on enlarged scale showing more particularly the side deliveryeye and its association with the sideopening in the shuttle.

The shuttle 1 has the bobbin chamber 2 for the weft or filling carrier or bobbin 3 on which the weft or filling thread a is wound.-

The wood of the shuttle is cut away at 4 to provide a threading block receiving chamber which may be provided with an opening 5 leading through the lower wall of the shuttle, as usual, and the side openings 6 for the block securing bolt. 1

The front wall of the threading block receiving chamber is intersected by the lower wall of the thread guiding recess 7, Fig. v7', formed in the wood of the shuttle, the intersection of the two walls at 8 forming a breast above the longitudinal axis of the shuttle and over which the thread is deflected, as will later appear. Within the thread guiding recess 7 is a friction pad 9 which may be formed of felt or other suitable material to impart the desired amount of friction to the thread when the shuttle is picked from the replenishing box and is not fully threaded.

The threading block 10 is shownas hav ing the two side walls 11 and 12 rising from practical the base portion 13, the space between such walls and the base portion forming the lon gitudinally extending thread passage. Projecting laterall and frontwardly from the side wall 12- o the threading block is the thread director 14 having a thread casting or tapering nose portion 15 which may be substantially similar to the corresponding for the free entrance and exit of the thread,

substantially as more fully described in the prior patent, and extending between the two side walls 11 and 12 is the bridge 16, the construction being such that there are no overhanging or overlapping portions formed in the threading block so that it is susceptible of being cast in a single piececomplete without machining or finishing.

It has not been possible, heretofore,1 to construct threading locks of cast iron in a single piece, because of overhangs, guards and like features and projections which necessitate a substantially solid casting, and while such metal possesses the desired hardness and unyielding character desired, that very attribute has prohibited its use on account of the boring, cutting and undercutting necessary, and further, the surface of cast iron does not lend itself to use in the weave room on account of the atmospheric conditions and the accumulation of rust thereon. When the threading block is formed with an unobstructed top opening, such as shown and described in applicants prior patent, a construction is provided which may be readily formed complete of cast iron in a single casting without the necessity of boring, cutting and undercutting, thus providing a wear resisting threading block of increased life and susceptible of repeated use in different renewal shuttles.

As a further feature of the present invention in this connection,.the cast iron threading block when formed of a single casting, as described, is provided with a covering or rust-resisting surface having a substantially finished and smooth thread engaging One good qsisting; surface to the cast. iron threading block, consists in heating the roast iron threading; block to a substantially dark red heat, plunging the heated threading block and that the rust-resisting surface be pro-' vided,.i wh ich, will present no objectionable resistance to theimovement of the thread,

weaving.

either in threading or-unthreading during way of providing such. rust-reinto linseedpil, and; then baking it or subjectin'g it-to -.a heat,treatment, .and while this method ,of providing the rust-proof wide a threading block of cast iron having shuttles surface to the threadingiblock is simple and eflective,-the invention is not necessarily limited thereto, because --'appli'cant believes himself, to be the first in*- the art to proa substantially permanent rust-proof covering foruse in automatically threading loom The threadinglblock it, is provided with avertical slotor, opening 17 which extends downwardl through the ,bottom wall 13 of the bloc and into thisopeningextends the securin portion- 18 of the'thread casting and gulding device 19. If-desired the thread casting and (guiding device'19 may be secured to thethrea ing block bya transverse securing, bolt 20,;as1in the prior patent, but "to prevent any pbssibility of the thread casting and v guiding :d'evice becoming disiplaced during the operation .of the-100m,

the-lower e portion 21 of the thread caste ingand gm g, device turned laterally to formafoot which may-fitinto a recess 22-formed in the lowerwall or ortion 13 of the' block. The foot 21 is pro ably best shown by Fig. 6 wherein itflwill-be noted that the foot; 21 extends laterally over a considerable portion-of the lower face of the wall-13 of the block and provides a V bearing'between the two which has 5 the effeet of preventing any tiltmg-movement of the thread'casting andguiding device in *1 the thread, passage when the parts are in assembled posit on in the shuttle.

. The thread casting, and guiding device 7 19 has the portion next adjacent thebobbin Y laterally of the thread the former application,

chamber extending upwardly at 23, gradualbobbin chamber forms a thread casting surface for throwing the thread out-of the control of said device on theformation of a 100p.

in the thread when the shuttle is suddenly arrested in the replenishing box.

it being understood On the formation of a loop, in the manner described, it is; desirable that the "side Walls of the thread castin block adjacent the loop castingportion of t e scrollshallnot interfere with the passage of the thread, andas contributing to this end, the present iifvention contemplates that-the edge portions of the side walls 11 and 12 adjacent the bobbin vchamber shall be inclined. upwardly and frontwar'dly as at25 and 26,"so that should the 100 of thread be thrown against the edge 0 the side wall, it would'stillnot retardthe. thread casting action of the thread casting and guiding device I v: V Theshuttle-is provided" with a side opening 27, asusual, for the delivery of the weft or filling thread, and in accordance with the present invention suchside opening is provided with a guide eye 28 having the upwardly extendingleg portions 29,'Fig. 9.

One of the upwardly extending leg portions l 29 of the guide eye is seated inwa' recess 30 formed in the shuttle wood,so that the upper end of the leg29 offers no obstructionto the free entrance ofthe thread into" the side eye. The opposite leg 29 extends upwardly and is seated in a recess 31 formed in the edge of the thread director 14, the result being that shouldthe thread lead backward from theentrance portion of the guideeye during the time the shuttle is in fl1ght,it will not enter the crack or opening 32, Fig. 9, be-

tween the rear edge portion of the thread di rector 14 and the wood of-the shuttle-and such condition will maintain, even though the wood of the shuttlemay shrink. v when theshuttle is arrested in the replemshmg box and a loop or overthrow of the thread-occurs, as indicated inf Fig. =1,

the thread is liable to be thrown out ofithe ,sldedelivery eye. Under such conditions, when the shuttle is picked fromthe replenishing box the. shuttlewill be'onlypartially threaded andthe threadwill lead, as indicated inFig. 8, from thebobbin and finally pass around and. into control of the thread casting and guiding device over the bridge 16 of the threading block and be deflected I by the higher breas't wall 8 of the guiding recess 7 whichwill direct the thread into contact with the friction pad 9, sothat when the shuttle passes. across the loom from the replenishing box,-suflicient tension will be placed upon the thread to insure it being properly laid in the shed. As-will be noted from Fig.8, the bridge 16 over which the thread passes during threading and subsequent weaving is slightly above the tapering end ortion of the thread casting and guiding evice, thereby insuringa proper control of the thread both during threadingand subsequent weaving. During the weaving operation the thread passes through the thread casting and guiding deviceover thebridge 16 and downwardly under the horn .of the threading block, then outward through the side delivery eye, such course of the thread in weaving.

at is claimed is:

1. An automatically threading loom shut-.

tle having a threading block receiving chamher and side delivery eye, a threading block secured in said chamber and provided with a thread passage which is open at its top for the unobstructed entrance and exit of the thread, a thread casting and guiding device in .the threadpassage, a bridge crossing the thread passage frontward of the thread casting and guidin device, a thread guiding recess having a reast wall at a higher elevation than the top of the bridge over which the thread is deflected when the shuttle is partially unthreaded and is picked from the "with a thread passage which has an unobstructed top opening for the free entrance and exit of the thread, a thread casting and guiding device in the open thread passage,

and a side eye located in the side opening of the shuttle with an upwardly projecting leg of the eye extending into and covered by the wood of the shuttle at one side of the opening and the other leg extending'into the threading block at the opposite side-of the opening. 3. An automatically threading loom shuttle having a threading block receiving chain her and a side delivery opening, a threading block secured in said chamber and having a thread passage with an open unobstructe top for the free entrance and exit of the thread, a thread casting scroll having a securing portion extending into the threading block with its lower part turned laterally to form a foot bearing on a part of the threading block, the part of the scroll adjacent the bobbin chamber extending in an upward, fron-tvvard, and lateral direction forming a thread casting portion.

4. A threading block for loom shuttleshaving a longitudinally extending thread passage with an open' unobstructed top for the free entrance and exit of the thread, a thread casting and guiding scroll having the part adjacent the bobbin chamber extending in an upward, frontward, and lateral direction to form a thread casting portion, and

a securing portion extending downward from the scroll into the threading block and provided with a lateral foot below the thread passage bearing on the threading block to prevent'displacement of the scroll during weaving.

5. An automatically threading loom shutimparting thereto the necessary tension durcasti tle having a threading block receiving'chamher and side opening, a threading bloc]; secured in said chamber and having a longitudinally extending'thread passage with an open top for the unobstructed entrance and exit of the thread the side walls of the thread passage being inclined upwardly and front wardly from the bobbin chamber, a thread and guidin scroll secured in the thre passage an having anupwardly,

casting ed e adjacent the bobbin chamber constructe andarranged to cast the thread from the scroll on the occurrence ofa loop as the-shuttle is arrested.

6. As an article of manufacture, a threading block for automatically threading loom shuttles formed of cast iron and having the thread engaging portions of the block overlaid by a smooth rust-proof covering which offers no objectionable resistance to the movement of the thread thereover.

7. As an article of manufacture, a threading block for automatically threading loom shuttles formed of cast iron andhaving the thread-engaging surfaces thereof covered by a'rust-proof and substantially non-frictional material adhesively secured thereto to present a smooth thread-engaging surface to the thread.

8. A threading block for loom shuttles having a. longitudinally extending thread passage with an unobstructed top opening for the ready exit of the thread on the occurrence of a loop or overthrow as the shuttle is arrested in the shuttle box said threading block being formed complete of cast iron, and a thread casting device in the thread passage for casting the thread upwardl through the open top of the threading b ock on the occurrence of a loop or overthrow.

9. A threading block for loom shuttles having a longitudinally extending thread passage with an unobstructed top opening for the ready exit of the thread on the occurrence of a loop or overthrow as the shuttle is arrested in the shuttle-box said threading block being formed complete of cast iron and provided with a surface covering pre- 115 sentingno obstruction to the thread movement in the threading or unthreading of the shuttle, and a thread casting device in the threadpassage for casting the thread upwardly through the open top of the -threading block on the occurrence of a loop or overthrow.

10. The method of forming a threading block for automatically threading loom shuttles which consists in forming the block of cast iron, then applying to the thread-engaging surfaces of the block a rust-proof covering, and then subjecting the block to a heat treatment to secure the covering thereon and cause it to present a rust-proof surface '75 frontwardly and laterally extending thread its 11. A threading block for loom shuttles having a, longitudinally extending threadpassage and formed complete of cast iron, the cast iron blockbeing provided with a smooth rust-proof surface covering which presents no objectionable obstruction to the thread movement, and a thread guiding device in the thread passage..

12. A threading block threading loom shuttles having a longitudinally extending thread passage with an open top for the entrance and exit of the thread, a thread casting and guiding device in the thread passage for casting the. thread upwardly on the occurrence of a loop or overthrow when the shuttle is arrested and provided with a securing portion extending downwardly and having a deflected foot which bears upon the threading block to' prefor automatically vent displacement of the thread casting and guiding device during. weaving.

13. An automatically threading loom shuttle having a threading block receiving chamber and side opening, a threading block secured in said chamber and having a longitudinally extending'thread passage with an open top for the unobstructed ening device in the thread passage to cast the thread upwardly from the thread passage on the occurrence of a loop or the shuttle is arrested.

In testimony whereof, Ihave signed my name to this specification.

EDWARD s. s'rmPsoN.

overthrow as 

